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 ###Instrução: Qual Temporada Regular tem uma Divisão de 4?
 ###Tabelas: CREATE TABLE year-by-year (year-by-year_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Division INT, League VARCHAR, Regular Season VARCHAR, Playoffs VARCHAR, Open Cup VARCHAR) CREATE TABLE national_league_one_table (national_league_one_table_id AUTO_INCREMENT PRIMARY KEY, Position INT, Club VARCHAR, Played INT, Won INT, Drawn INT, Lost INT, Pts For INT, Pts Agst INT, B.P. INT, Points INT) CREATE TABLE draft_class (draft_class_id AUTO_INCREMENT PRIMARY KEY, Round INT, Selection INT, Player VARCHAR, Position VARCHAR, College VARCHAR) CREATE TABLE north_dakota_counties_by_per_capita_income (north_dakota_counties_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE financial_performance (financial_performance_id AUTO_INCREMENT PRIMARY KEY, Year ended VARCHAR, Passengers flown INT, Employees (Average/Year) INT, Net profit/loss (SEK) INT, Basic eps (SEK) INT)  
SELECT Regular Season FROM year-by-year WHERE Division = 4